Jacket for sand molds



s. P. GREENE May 12, 1925. a

JACKET FOR SAND MOLDS A TTOR EY'I.

Patented May 12, 1925 j j v UNITEDSTATES PATENT orrics.

SAMUEL P. GREENE, OF DAYTON, OHIO, ASSIGNOR TO THE STANDARD FOUNDRY COMPANY, OF DAYTGN, OHIO. i

JACKET FOR SAND MGLDS.

- A'pplic'ation filed September 4, 1923-. Serial No. 660,851.

ToaZZ whom it may concern: Fig. 4, is a cross-sectional view through Be it known that I, SAMUEL P. GREENE, the sand mold and cores as arranged for a citizen of the United States, residing in pouring the metal. Dayton, in the county of Montgomery and Fig. 5, is a view of a flask, partly in State of Ohio, have invented certain new broken section, showing the manner of us- 55 and useful Improvements in Jackets for ing afiask as a pattern for the jackets. Sand Molds or the like, of which the fol- As here shown the jacket is an integral lowing is a specification, reference being rectangular shaped casting, 1, conforming had therein to the accompanying drawings. to the shape of a flask. Flanges 2 and This invention relates to improvements in are -formed on the four sides of the jacket 60 jackets for sandmolds used in casting metal. flange 2' serving as a hand hold for rais- The object of the invention is to provide ing and lowering the jacketrelative to the integral cast iron jackets as a substitute for sand mold, and flange 3 as a base for the wood or sheet metal jackets which are used jacket, both flanges acting to strengthen the for supporting the sand molds after the jacket and to keep the sides straight in 65 same have been removed from the flasks casting. while the metal is being poured into the The jackets are made in sets, each set conmolds. forming in inside length, width and taper 00d jackets, which are commonly used to the sand flask in connection with which 29 for this purpose, require constant up keep the jackets are to be used. lVhile any suitdue to burning of the. wood by coming in able pattern may be used for producing the contact with the hot metal, also due to the jackets, the best results are obtained, and tendency of the jackets to be rendered out with reduced pattern cost, by using the sand of shape through warping of the wood and flasks as patterns. By adding a bottom exthe rough usage which foundry equipment tension -3t-, to a flask 5, as indicated in receives, this latter difiiculty being also ex- Fig. 5, of the drawings, to compensate for perienced with sheet metal jacketswhich shrinkage of the metal in casting, the inside renders sheet metal jackets impracticable dimensions in length, breadth and taper of for general use as a substitute for wood the flask can be closely approximated in the 30 j k t 7 jacket castings made from it, the height,

The improved cast iron jacket of the thickness of the walls and externalco'nforpresent invention effectually overcomes the mation of the castings being determined by difficulties as it retains its shape and is pracusing suitable cores, as indicated in Fig. 4, tically indestructible under any conditions in preparing the molds. J f c Having described my invention, I claim: 3

While the cast iron jackets may be made 1. The herein described method of cast from any suitable pattern,.it has been found ing jackets for sand molds consisting in desirable in the practice of the invention to d p g'e Sand flask 5IS the Pattern 11 use the flask, in connection with which each jacket, in Using he fl S0 COHStYuCtefl I50 40 set of jackets is to be used, as the pattern form the inner part of a sand mold for the g 'iorthe jackets in order to obtain an apjackets,in arranging cores relative the said proximate duplication of inner dimensions inner part to complete the moldand in castin the jacket to the corresponding dimening a jacket therein.

sions of the flask. 7 V 2. The herein described method of casting In the accompanying drawings: jackets for sand molds consisting in adapt- Fig. 1, is a side view of the improved ing a, sand flask as the pattern for a jacket, jacket, V by adding an extension of the flask to the Fig. 2, is a plan view, bottom thereof, in using the flask as con- Fig. 3, is a side view of the jacket as apstr'ucted to form the inner part of a sand 50 plied to asand mold. mold for the jackets, in arranging cores relative to said inner part to complete the mold and in casting a jacket therein.

- 3. The herein described method of casting j ackets for sand molds consisting in adapting a common sand flask as the pattern for a jacket, in supporting the flask in raised position relative to the inner sand mold-01- the jacket to compensate for shrinhm o of the metal in casting; with respect to the taper of said jacket, in arranging cores exter- 1O nally to complete said mold and in casting 1r jacket therein.

In testimony whereof I uiTix-niy signature.

SAMUEL P. GREENE. 

